Furnace-grate



(No Model.) v 2 Sheets-Sheet 1.

A. WILKINSON. FURNACE GRATE.

Patented Apr. 4, 1893.

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t e e h S w e e h S 2 0% mm L m WE U mP a d O M 0 W Patented Apr. 4,1898.

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UNITED STATES Fries.

PATENT ALFRED WILKINSON, OF BRIDGEPORT, PENNSYLVANIA, ASSIGNOR TO THE\VILKIN8ON MANUFACTURING COMPANY, OF PENNSYLVANIA.

FU RNACE-G RATE.

SPECIFICATION forming part of Letters Patent No. 494,831, dated April 4,1893.

Application filed July 23, 1892. Serial No. &40,965. (No model.)

To all whom it may concern:

Be it known that I, ALFRED WILKINSON, a citizen of the United States,and a resident of Bridgeport, Montgomery county, Pennsylvania, haveinvented certain Improvements in Furnace-Grates, of which the followingis a specification.

The object of my invention is to provide a simple and effective form ofash discharger IQ for furnace grates, said ash discharger beingespecially intended for use in connection with grates having inclinedbars, such for instance as shown in my application for patent filedFebruary 29, 1892, Serial No. 423,257.

In the accompanying drawings :Figure 1, is a longitudinal sectional viewof sufficient of my improved grate to illustrate the application of theash discharger thereto. Fig. 2, is a sectional plan view of the same.Fig. 3,

is a perspective view of one of the sections of the ash discharger. Fig.4 is a sectional view illustrating a modification of the invention. Fig.5, is a side view, partly in section, of a device employed for operatingthe ash discharger; and Fig. 6, is an end view of said device.

It will not be necessary to describe the construction of the grateitself, as that is fully set forth in my application for patent before 0alluded to, hence it will be sufiicient in this specification to saythat the grate bars G are inclined and rest at their lower ends upon atransverse'beam or girder I-I so as to form between the base of thegrate and the bridge wall A, a well J for receiving the ashes. Thebottom of said well J is closed by a rotating ash discharger K which, inthe form shown in Figs. 1 and 2, consists of a series of disks m (Fig.3) secured to a hollow shaft M which is adapted to turn in suitablehearings in the side walls of the furnace and projects beyond one ofsaid side walls for the application of power whereby it can be rotated.Each disk at has side lugs n whereby the disks are sepa- 5 rated to thedesired extent, and in each disk are formed opposite recesses s,segmental in the present instance, although they may be of any desiredform. The recesses of the disk are in line with each other, hence, asthese recesses are successively brought under the well J by the rotationof the ash discharger,

they form longitudinal troughs or channels which receive the ashes andconvey the same forward in the direction of the arrow Fig. 1,

so as to dump them into the ash pit, the adjacent face of the girder Hbeing preferably concave so as to permit. the disks m to work in closeproximity thereto.

The rotating shaft M of the ash discharger may, if desired, be drivencontinuously by means of a. suitable chain belt and sprocket wheels fromany adjacent power driven shaft, but, as this means of operating the ashdischarger may not in many cases be available or advisable, I providefor the purpose ratchet lever mechanism such as shown in Figs. 5 and 6,in which P represents a ratchet wheel secured to the shaft M of the ashdischargerand S, S, represent a pair of levers loosely hung to saidshaft and carrying between them a weighted pawl W for engagement withthe teeth of the ratchet wheel as shown in Fig. 5. The upper portions ofthe levers S are connected by transverse pins m which form a socket forthe reception of the butt 5c of 7 5 the operating handle T whereby thelovers may be conveniently vibrated so as to rotate the ash dischargerbyaseries of intermittent movements of partial rotation, a transversepin '5' being used, if desired, to prevent the accidental withdrawal ofthe handle bar from engagement with the levers.

Although I prefer to form the ash discharger of a series of disks strungupon a transverse shaft in the manner dscribed, other forms of rotaryash dischargers within the scope of my invention will readily suggestthemselves to those skilled in the art, for instance, the device may bein the form of a hollow cylinder K with opposite recesses s, such forinstance as shown in Fig. 4, said cylinder having at its opposite endssuitable trunnions adapted to hearings in the side walls of the furnace,these trunnions being also hollow when it is desired to cause acirculation of air or steam through the cylinder for cooling purposes.

Having thus described my invention, I claim and desire to secure byLetters Patent- 1. The combination in a grate for furnaces, of inclinedgrate bars, with a rotary ash dis- Ioo charger at the base of the gratebars, said ash discharger comprising a series of recessed disks mountedside by side upon a shaft whereby the parallel recesses of the series ofdisks form an ash receiving trough or chamber, substantially asspecified.

2. The combination in a grate for furnaces, of inclined grate bars, witha rotary ash discharger at the base of the grate bars, said ashdischarger consisting of a series of disks mounted upon a shaft and eachhaving latererally projecting lugs for bearing upon the adjacent disk,said discharger having one or more recesses for receiving, conveying anddischarging the ashes, substantially as specified.

3. The combination in a grate for furnaces, of the inclined grate bars,the transverse sup-

